focuser
noun
focuser is a noun meaning “A device which allows one to adjust the focus of an instrument such as a telescope” (English Wiktionary, September 2026). It is spelled F-O-C-U-S-E-R, and it appears about once in every 40 million words in written English (wordfreq, 2021 data). The plural of focuser is focusers.
What does focuser mean?
noun
- 1
A device which allows one to adjust the focus of an instrument such as a telescope.
I decided to upgrade my telescope with a feather-touch focuser.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of focuser
- focusers plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is focuser?
Focuser appears about once in every 40 million words in written English, the 194,306th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does focuser come from?
From focus + -er.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).